This deal has ended.
This 20 treatment pack of Crest 3D White Whitestrips Professional Effects drops from $54.99 to $39.99 to $29.99 with a mail-in rebate at Drugstore.com. With free shipping, this is the best deal we could find on this pack by $8. As a bonus, purchase 2 to bring your total over $50 and check the "special offer" box on the product page to receive a $15 gift card. There is no sales tax (except IL, NJ, NY and WA).